异常分娩

081638血清肌酸激酶及同工酶在胎盘植入中的诊断价值/陈宏霞…∥中国实用妇科与产科杂志.—2008,24(9).—686～687目的:探讨血清肌酸激酶(CK)及同工酶测定在胎盘植入中的诊断价值。方法:2004年1月至2007年1月在中山市人民医院测定33例正常产妇及85例临床疑诊胎盘植入产妇血清CK及同工酶。结果:胎盘植入产妇31例血清CK水平为(143.1±28.5)U/L,其中MB13%,MM87%,BB未测出,胎盘粘连产妇26例血清CK水平为(76.3±25.4)U/L,其中MB4%,MM96%,BB未测出;其他产妇38例血清CK水平为(69.3±24.4)U/L,其中MB5%,MM95%,BB未测出。正常产妇33例血清CK水平为(68.4±24.4)U/L,其中MB4.5%,MM94.5%,BB未测出。胎盘植入组产妇血清CK水平明显高于胎盘粘连组、其他产妇组和正常产妇组,差异有统计学意义(P<0.01),且其中MB型所占比例明显升高,各组BB型均未测出,以CK活性为96U/L作为诊断胎盘植入的界值,敏感性为91.3%,特异性为89.0%,阳性预测值83.8%,阴性预测值96.9%。结论:测定血清肌酸...     

资产质量、盈余质量与企业价值的关系研究——基于中国创业板制造业上市公司的数据分析

为了研究影响企业盈余、企业价值取向的相关因素,选取中国制造业创业板上市公司2010-2014年的数据为样本,采用主成分分析和多元线性回归方法,对企业资产质量与盈余质量以及盈余质量与企业价值之间的关系进行了研究。研究表明:企业的资产质量越高,盈余管理程度越低,其盈余质量越高,即企业的资产质量与企业的盈余质量正相关;企业的盈余质量越高,价值越高,即企业的盈余质量与企业价值正相关。研究结果对于企业提升盈余质量、提高自身价值具有参考作用。     

产科特殊检查

081641B超检测妊娠晚期子宫下段瘢痕厚度对再次剖宫产的意义/李学和…∥实用妇产科杂志.—2008,24(9).—568～569目的:探讨B超检测妊娠晚期子宫下段瘢痕厚度对再次剖宫产术的意义。方法:对2007年1～12月该院再次剖宫产病例在术前均行B超检查子宫下段瘢痕厚度。其中瘢痕厚度>3mm组60例,瘢痕厚度≤3mm组26例,对病例的术前宫缩情况、术中出血量、缩宫素总用量与产后出血发生率进行比较。结果:再次剖宫产孕妇B超检查子宫下段瘢痕厚度≤3mm组在术前宫缩、产后出血发生率、缩宫素总用量上与>3mm组孕妇相比,差异均有统计学意义(P<0.05)。结论:术前B超检测妊娠晚期子宫下段瘢痕厚度对再次剖宫产术中的处理有指导意义。表1参3(原文摘要)081642腹部超声与阴道超声在异位妊娠诊断中的价值/罗青…∥中国计划生育学杂志.—2008,16(8).—486～488对收治的197例异位妊娠患者进行回顾性分析,对比经腹部超声(TAS)和经阴道超声(TVS)两种检查方法的阳性确诊率。结果:197例中75例经TAS检查诊断62例,阳性确诊率82.3%;72例经TVS检查诊断65例,阳性确诊率90.3%;50例经TA...     

SPI干旱指数在辽宁中南部地区干旱评价中的运用研究

文章以辽宁中南部区域内各气象站点1954~2014年气象监测数据,采用SPI干旱指数对辽宁中南部1954~2012年的干旱情况进行评价,并结合SPT干旱指数旱涝评定标准,分别统计了年尺度和季节尺度区域不同程度干旱发生的频次。研究结果表明:从1954年~2014年,辽宁中部发生总干旱的频率为60.1%,发生极端干旱的频率为1.7%,南部区域发生总干旱的频率总体低于中部区域,为55.7%;辽宁中部和南部均在冬季较易发生干旱,频率分别为72.8%和66.8%,在夏季出现极端干旱的频率最高,且中部高于南部,分别为3.2%和2.8%。研究成果对于辽宁南部和中部区域干旱评估研究提供参考价值。     

关联担保、隧道效应与公司价值

本文以1998—2004年765家对外提供关联担保的上市公司为样本,考察了关联担保程度与企业价值的关系。同时截取2004年的225个样本公司,采用Logistic回归,检验了非正常关联担保发生概率与股权结构、自由现金流以及上市公司所在地区信贷分配市场化程度的关系。最后,根据关联担保对象,以1998—2004年仅发生一种类型关联担保的390家公司为样本,研究了不同类型关联担保对企业价值的影响差异。我们发现,①关联担保程度与企业价值显著负相关,关联担保程度越大,对企业的价值侵害程度越高。②企业财务杠杆和自由现金流量水平越高,发生非正常关联担保的相对概率越大,而最终股东持股比例越高,上市公司所在地区信贷分配的市场化指数越大,发生非正常关联担保的相对概率则越小。③不同类型的关联担保对企业价值的影响程度是有差异的,上市公司向控股股东提供关联担保对企业价值的损害程度最大。     

染色体和遗传

081628先天性心脏缺陷患者染色体22q11微缺失的检测/张志芬…∥中国计划生育学杂志.—2008,16(8).—488～490为通过建立先天性心脏缺陷患者染色体22q11微缺失的诊断方法,探讨各类先天性心脏缺陷患者染色体22q11微缺发生情况。应用生物素标记的染色体22q11区域特异探针,对外周血淋巴细胞和羊水细胞染色体进行原位杂交遗传检测和产前诊断。结果:在50例先天性心脏病患者中,有5例患者染色体22q11微缺失,缺失率为10%。5例孕妇产前诊断未发现染色体22q11微缺失。结论:应用荧光原位杂交法检测22q11微缺失可作为先天性心脏缺陷病因诊断的方法,通过产前诊断可以避免染色体22q11微缺失的心脏缺陷儿出生。图2参8(周继铭)081629短串联重复序列聚合酶链反应技术快速诊断常见染色体三体的价值/张慧敏…∥中国实用妇科与产科杂志.—2008,24(8).—611～613目的:探讨短串联重复序列聚合酶链反应技术(STR-PCR)诊断染色体三体应用价值。方法:2003年12月至2005年2月对广州医学院第三附属医院染色体结果已知的50例正常样本和17例唐氏综合征(Downs')患者样本进行STR-PC...     

米索前列醇联合利多卡因在早孕人工流产术中的应用

目的:探讨米索前列醇联合利多卡因在早孕人工流产术中扩张宫颈及镇痛作用。方法:选择宫内早孕,要求人工流产术且无人工流产禁忌证的276例患者,随机分为观察组156例与对照组120例,观察两组宫颈松弛效果、术中疼痛情况、手术时间、出血量、人流综合征发生率等情况。结果:观察组的宫颈扩张情况及镇痛作用明显优于对照组。结论:米索前列醇联合利多卡因宫颈旁阻滞麻醉在人流术中宫颈扩张情况以及镇痛效果比单用利多卡因的效果好,宫颈松弛满意,使用方便,安全有效,可推广使用。     

人工流产

081613微型吸管加宫颈表面麻醉用于早早孕无痛人工流产的临床研究/董冬梅…∥实用妇产科杂志.—2008,24(7).—409～411探讨微型吸管加宫颈表面麻醉用于早早孕无痛人工流产的临床效果。方法:早早孕妇女分成3组,每组100例,分别采用微型吸管加宫颈表面麻醉法、传统人工流产术及药物流产3种不同方法终止妊娠,观察3组流产过程中腹痛情况、阴道流血持续时间及完全流产率等指标。结果:微管组与传统人工流产组相比,手术时间缩短,术中出血量减少。在术中疼痛程度、术后出血时间方面同传统人工流产组及药物流产组比较,差异有统计学意义(P<0.05)。完全流产率达100%,未发现并发症。结论:微型吸管加宫颈表面麻醉法终止早早孕,简便易行,手术时间短,疼痛程度轻,术后出血时间短。表5参4(原文摘要)人工流产     

先天性异常与优生学

081630胎儿心脏大动脉畸形的产前超声心动图诊断技术探讨/王鸿…∥中国优生与遗传杂志.—2008,16(10).—94～95目的:探讨胎儿心脏大动脉畸形的产前超声心动图诊断方法及操作技术路线。方法:对已检出的117例胎儿复杂型先天性心脏病(先心病)合并大动脉畸形胎儿进行回顾性分析并与尸检和出生后手术及超声检查进行对比。结果:117例复杂先心病胎儿的大动脉交叉图显示无交叉关系及交叉关系异常65例(55.5%);检出大动脉内径及瓣膜异常为51例占43.5%(其中大动脉内径异常35例;主动脉瓣/肺动脉瓣狭窄16例)。结论:胎儿心脏大动脉畸形在胎儿心脏病诊断中属难度最大和最易发生漏诊,检查中应明确血流动力学异常改变及动态显示有无大动脉交叉切面及血管排列、内径、瓣膜形态及数量、瓣上和流出道等异常改变。表1参7(原文摘要)先天性异常与优生学     

行业行为

磷硫资源每年减少硫资源自给率不足2003年中国磷矿消耗已接近2005年的预测值;中国具有经济价值的磷矿基础储量仅40.54亿吨,正以每年1亿吨的惊人速度下降;2003年我国硫资源自给率不足50%,可供和基本可供开采储量只有1.9亿吨,可供期限只剩11年。中国磷肥工业协会已向国土资源部及     

研发投入与企业业绩相关性研究——基于中国制造业上市公司的实证分析

研发投入是企业增强核心竞争力和实现可持续发展的关键因素。我国企业的研发投入主要集中在制造业。本文以制造业71家上市公司为研究对象,通过对样本公司R&D投入与企业业绩及企业价值的相关性分析,揭示企业R&D投入对企业业绩的影响作用及对公司价值提升的促进作用。研究结果表明,我国制造业上市公司的R&D投入强度偏低,R&D投入明显不足,但R&D投入强度在2007~2009年3年中逐年上升。企业当期R&D投入与企业当期营业毛利率有显著的正相关关系,滞后一期R&D投入与企业当期营业毛利率仍然存在较为显著的正相关关系,但滞后两期R&D投入与企业当期营业毛利率不存在显著的正相关关系。表明企业R&D投入对企业业绩有一定的影响,且存在一年的滞后性,滞后期较短。同时,企业的R&D投入与托宾Q值存在显著的正相关关系,说明企业的R&D投入与企业价值相关,R&D投入通过对企业业绩的影响来提升公司价值。     

Does brand partnership create a happy marriage? The role of brand value on brand alliance outcomes of partners

In this paper, we investigate an under-researched issue by examining the financial performances of both partner firms in a brand alliance. We find that a participating firm's brand value and other brand characteristics are associated with not only its own financial performance but also its partner's financial gains from the collaboration. Our results show that the participating firm gains higher stock returns when its partner's brand value is higher. However, brand value differential reduces the positive effect of brand value on the partner firm's financial performance. In addition, the primary partner's brand alliance experience helps increase the positive effect of primary partner's brand value on the stock returns of the secondary partner. The secondary partner's brand exploitation attenuates the positive effect of secondary partner's brand value on the stock returns of the primary brand firm.     

Red and Blue: the relationship between the institutional context and the performance of leveraged buyout investments

This paper advances the debate concerning the relationship between politics and business conduct by investigating the influence of the institutional context on leveraged buyout investments. We propose that the formal and informal institution context in ‘red’ states (those dominated by the U.S. Republican Party) is more aligned with the principal strategies through which leveraged buyout investors create value than such a context is in ‘blue’ states (those dominated by the Democratic Party). Therefore, according to institutional theory, one would expect, ceteris paribus, a higher likelihood of buyout transactions in red states and vice versa. We analyze a sample of 10,746 U.S. buyout investments in 4,633 distinct target companies made by 2,396 different funds managed by 1,300 private equity firms from 1980 to 2003. The results indicate strong evidence of a positive association between a more aligned institutional context and both the volume of buyout activity and different measures of performance for these buyouts. Copyright © 2011 John Wiley & Sons, Ltd.     

基于ITD-ELM的变压器绕组微弱匝间短路故障诊断

为了解决油浸式变压器内部绕组绝缘故障检测难度大的问题,提出了一种基于本征时间尺度分解(ITD)和极限学习机(ELM)的变压器绕组微弱匝间短路故障诊断方法。首先,将采集到的变压器可听声信号利用ITD算法分解为若干旋转(PR)分量,并将峭度值较大的分量信号相加,对可听声信号进行重构;其次,将重构后的变压器可听声信号作为模型输入层,故障诊断结果作为模型输出层,构建了基于ITD-ELM的变压器绕组微弱匝间短路故障诊断模型;最后,以一台110 V变压器搭建实验模拟平台,对其微弱匝间短路故障进行训练并诊断。结果表明：基于ITD-ELM模型的微弱匝间短路故障诊断精确率为98%,较传统的ELM故障诊断精确度提升了3%,验证了所提变压器绕组微弱匝间短路故障诊断方法的准确性。研究所提出的故障诊断方法准确性较高,可应用于现场运行的不同电压等级的油浸式变压器。     

Changes in sales call frequency: A longitudinal examination of the consequences in the supplier-customer relationship

Sales calls are one of the most valuable and expensive resources available to industrial sales managers. The main purpose of this research was to look at the relationship between an increase in sales call frequency and some important outcomes in the buyer-seller relationship. To do so, we adopted a longitudinal research design where data from 357 customers of one industrial supplier were obtained over a two-year period of time. Results indicated that an increase in call frequency has a positive effect on sales volume, perceived service quality, perceived value for money and overall customer satisfaction. Furthermore, these effects tend to diminish as relationships become longer, and are stronger at higher levels of hierarchy in the buying company.     

Does market orientation matter?: a test of the relationship between positional advantage and performance

A recent series of articles in the Strategic Management Journal has discussed the potential value of an organization developing a market orientation in its quest to achieve success. We posit that market orientation can enhance success, but that its potential value should not be considered in isolation. Specifically, we draw on the resource‐based view of the firm to suggest that four capabilities—market orientation, entrepreneurship, innovativeness, and organizational learning—each contribute to the creation of positional advantages for some firms. The data used are drawn from 181 large multinational corporations (MNC). The results indicate that positional advantages arising from the confluence of market orientation, entrepreneurship, innovativeness, and organizational learning have a positive effect on MNC performance (five‐year average change in ROI, income, and stock price). Overall, the results support the contention that market orientation can enhance success, albeit within the context of other important phenomena. Copyright © 2001 John Wiley & Sons, Ltd.     

Moderating Effects of Nationality and Product Category on the Relationship between Innovation and Customer Equity in Korea and China

Innovation has become a key concept in recent decades. Truly innovative products can create value for consumers, extend the product category, generate higher margins, and strengthen the brand. Simply speaking, relationships may form between product innovation and each driver of customer equity. However, for different product categories and nationalities, this relationship may differ. This paper not only identifies the relationships between innovation and customer equity, but also examines the moderating effects of product category and nationality. In total, 409 consumers from Korea (n = 200) and China (n = 209) were surveyed by questionnaire in this study. The stimuli of the degree of innovation (i.e., radical or incremental) included Nike+Ipod and Adidas 1, and Nike Air Max and Adidas Team Series from the shoe industry, while H&M designer label and Nano material, and H&M seasonal collection and cycle material from the clothing industry. Structural equation modeling was used to test the hypotheses. The results show that the degree of innovation exerts positive influences on value equity and brand equity, which can be drivers of customer equity. Thus, the reason firms launch innovative products is not only to boost sales by increasing customer value, but also to improve brand image, which can influence the customers’ purchase decision. The relationship between innovation and customer equity can be moderated by product category and nationality. Managers should develop different innovation strategies based on different product categories and customer nationalities.     

Ownership structure and economic performance in the largest european companies

The paper examines the impact of ownership structure on company economic performance in 435 of the largest European companies. Controlling for industry, capital structure and nation effects we find a positive effect of ownership concentration on shareholder value (market‐to‐book value of equity) and profitability (asset returns), but the effect levels off for high ownership shares. Furthermore we propose and support the hypothesis that the identity of large owners—family, bank, institutional investor, government, and other companies—has important implications for corporate strategy and performance. For example, compared to other owner identities, financial investor ownership is found to be associated with higher shareholder value and profitability, but lower sales growth. The effect of ownership concentration is also found to depend on owner identity. Copyright © 2000 John Wiley & Sons, Ltd.     

Do farmers’ organizations enhance the welfare of smallholders? Findings from the Mozambican national agricultural survey

Farmers’ organizations have been used as a tool to improve the living conditions of farmers in many countries by improving market access, access to information and capacity to increase production. I employ panel data from Mozambique to investigate how membership in farmers’ organizations impacts smallholders’ welfare. Using difference-in-difference estimators that control for unobservable selection bias, I find a positive impact of membership on the marketed surplus (25%), the value of agricultural production (18%) and on total income (15%, and more than 20% for those whose main source of cash income is the agricultural sector).     

Standard essential patents and global ICT value chains with a focus on the catching-up of China

Patents, standards and their combination, standard-essential patents (SEPs), are important in the information and communication technology (ICT) sector, in particular in mobile communication. We argue that SEPs are relevant in macroeconomic development and estimate the effect of a country's SEP portfolio on its value-added trade in global ICT value chains (GVC). We find that SEPs retain a higher share of value-adding domestically and that absorptive capacity is needed to join GVCs. China entered the SEP market late and is catching up rapidly. The trade effect of SEPs on China is different from that on matured economies because of the initially low value of its SEPs.